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Let the present age of rahul be 5x and the present age haroon be 7x fter 4 years, their ages will be 5x+4 and 7x+4 also (5x+4)+(7x+4)=56 therefore 12x+8=56 therefore 12x=56-8 12x=48 x=48/12 thereforex=4 since x=4, 5x=5*4=20 and 7x=7*4=28 therfore their present ages are 20 and 28. (Ans.)

Let the common multiple be x. Therefore, present age of rahul is 5x and present age of haroon is 7x. After 4 years' age of rahul will become=(5x+4); age of haroon will become=(7x+4); According to the question; (5x+4)+(7x+4)=56 therefore, 5x+4+7x+4=56 12x+8=56 12x=56-8 12x=48 x=48/12 x=4 therefore present age of rahul is=5x=5*4=20years. and present age of haroon is =7x=7*4=28 years. hope i helped u:)